CN211512804U - Wedge-shaped artificial bone used after high tibial osteotomy - Google Patents
Wedge-shaped artificial bone used after high tibial osteotomy Download PDFInfo
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Abstract
The utility model provides a use wedge artificial bone after high-order osteotomy of shin bone, include: the short carbon fiber reinforced polyether-ether-ketone wedge-shaped bone main body; a bone growth hole opened in the wedge-shaped bone main body; and the filler is filled in the bone growth hole and can promote the bone growth. The utility model provides a high-order osteotomy of shin bone back can maintain mechanical mechanics's support with wedge artificial bone, prevents to sink, can possess good biological performance again, promotes the bone healing.
Description
Technical Field
The utility model belongs to the technical field of medical instrument, concretely relates to high-order osteotomy of shin bone is with wedge artificial bone.
Background
The osteoarthritis patients in China exceed 10% of the total population, the treatment cost caused by the orthopaedic chronic diseases in China is increased to 850 billion by calculation in 2020, the incidence rate of the gonarthritis in 20 years in 1990-2010 is increased to 45%, and the disability rate is the second place in the world. For the early and middle stage arthritis disease cases with serious symptom signs, particularly the knee protection surgery mainly involving the medial compartment of the joint, which is the osteotomy orthopedic, is the mainstream means at present. High Tibial Osteotomy (HTO) is the most important and promising surgical procedure in knee protection surgery, and has the effects of avoiding or promoting Total knee replacement artificial joint (TKA) surgery if osteotomy is accurate and prosthesis implantation is firm. However, due to individual differences of varus angles, whether to combine front and back inclination, the height and depth of the implanted prosthesis and the like of different patients, and lack of proper bone cutting, fixing, repairing and reconstructing materials, the problems of inaccurate bone cutting tools, unstable fixation, implant collapse, non-union of fracture and the like easily occur in clinic, so that the immediate stability and the long-term curative effect after bone cutting cannot be ensured. The selection of the orthopedic implant material and the structure can not only maintain the support of mechanical mechanics and prevent collapse, but also have good biological performance and promote bone healing, and is a difficult problem after HTO osteotomy.
After traditional HTO osteotomy, three materials are usually adopted as implant materials, including firstly, autogenous bone, but the problems of increased operative wound, susceptibility to infection and pain of the bone-taking part and the like exist; allogenic bone, which is easy to cause allograft rejection, and the controllability of absorption and regeneration of the implant is poor; ③ artificial bone materials, including hydroxyapatite, calcium phosphate, tricalcium phosphate (beta-TCP), etc., but insufficient mechanical structure, delayed healing associated with bone grafting, soft tissue infection and allergy, etc. And the three parts are fixed by adopting the steel plate due to insufficient strength of the implant, so that the problem that the steel plate needs to be taken out in a secondary operation is caused, and if the steel plate is not taken out in the secondary operation, great inconvenience is possibly caused for the TKA operation in the future.
SUMMERY OF THE UTILITY MODEL
In view of this, the to-be-solved technical problem of the utility model lies in providing a wedge artificial bone is used after high-order osteotomy of shin bone, the utility model provides a high-order osteotomy of shin bone back can maintain the support of mechanical mechanics with wedge artificial bone, prevents to sink, can possess good biological performance again, promotes the bone healing.
The utility model provides a use wedge artificial bone after high-order osteotomy of shin bone, include:
the short carbon fiber reinforced polyether-ether-ketone wedge-shaped bone main body;
a bone growth hole opened in the wedge-shaped bone main body;
and the filler is filled in the bone growth hole and can promote the bone growth.
Preferably, the bone growth hole penetrates through the wedge-shaped bone body, or is arranged on the surface of the wedge-shaped bone body, or penetrates through the wedge-shaped bone body and is arranged on the surface of the wedge-shaped bone body in a combined manner.
Preferably, the porosity of the short carbon fiber reinforced polyether-ether-ketone wedge-shaped bone main body is 5% -40%, and the diameter of the bone growth hole is 0.5-10 mm.
Preferably, the included angle of the wedge-shaped artificial bone inclined plane is 3-30 degrees.
Preferably, the filler is tricalcium phosphate, calcium sulfate hemihydrate, PLGA, bioceramic or bioglass.
Preferably, the bone fixing device further comprises a fixing hole arranged in the wedge-shaped bone body.
Compared with the prior art, the utility model provides a use wedge artificial bone after high-order osteotomy of shin bone, include: the short carbon fiber reinforced polyether-ether-ketone wedge-shaped bone main body; a bone growth hole opened in the wedge-shaped bone main body; and the filler is filled in the bone growth hole and can promote the bone growth. The utility model discloses the short carbon fiber reinforcing polyether ether ketone with high strength can prevent to sink as the main part material of wedge bone, avoids the too high human internal bone tissue of intensity of wedge bone main part to produce stress shielding effect simultaneously, the bone growth hole has been seted up to wedge bone main part, makes the intensity matching of wedge bone main part and human internal bone tissue to it has the filler that can promote bone growth to grow the downthehole packing, because the filler has good biological activity and biocompatibility, under the effect of body fluid, the filler can take place partial degradation, and the material that dissociates after the degradation can be absorbed by human tissue and utilized, grows out new tissue, thereby has produced good bone conduction effect. The new bone that osteoacusis produced can grow into the inside bone growth hole that the artificial bone main part was seted up, forms three-dimensional interpenetrating structure with original bone and new bone, is favorable to the combination of artificial bone and patient self bone, has solved artificial bone implantation patient internal unable technical defect with patient self bone fusion, can avoid artificial bone not hard up simultaneously, and patient's activity is more free, can not arouse painful uncomfortable sense because of friction between artificial bone and self skeleton.
Drawings
FIG. 1 is a schematic view of an included angle of a wedge-shaped bone bevel provided by the present invention;
FIG. 2 is a schematic structural view of a wedge-shaped artificial bone for high tibial osteotomy according to the present invention;
FIG. 3 is a schematic view of an HTO surgical osteotomy site;
FIG. 4 is an external view of a wedge-shaped artificial bone body;
FIG. 5 is a perspective view of a wedge-shaped artificial bone body;
figure 6 is a cross-sectional view of a wedge-shaped artificial bone body.
Detailed Description
The utility model provides a use wedge artificial bone after high-order osteotomy of shin bone, include:
the short carbon fiber reinforced polyether-ether-ketone wedge-shaped bone main body;
a bone growth hole opened in the wedge-shaped bone main body;
and the filler is filled in the bone growth hole and can promote the bone growth.
The utility model provides a wedge artificial bone is with short carbon fiber reinforcing polyether ether ketone wedge bone main part after high-order osteotomy of shin bone.
The short carbon fiber reinforced polyether-ether-ketone material has a modulus more similar to that of human cortical bone; higher strength, and lower amount of deformation under force.
The length-diameter ratio of short carbon fibers in the short carbon fiber reinforced polyether ether ketone is (50-300): 1, the fiber length of the short carbon fiber is 0.5-3 mm; the content of short carbon fibers was 30 wt%.
The mechanical properties of the short carbon fiber reinforced polyether-ether-ketone used in the utility model are shown in table 1
TABLE 1 mechanical Properties of short carbon fiber reinforced polyetheretherketone
Wherein, the utility model discloses to the specific source of short carbon fiber reinforcing polyether ether ketone wedge bone main part does not have special restriction, and the short carbon fiber reinforcing polyether ether ketone bone material that skilled person is known can all be used for the utility model discloses as wedge bone main part.
The compact area of the wedge-shaped bone body has 100 percent strength and modulus, and is close to the modulus of human cortical bone. The framework pore area reduces the strength and modulus, and can be adjusted to be similar to the cancellous bone of a human body. Therefore, when the artificial bone scaffold with high porosity is manufactured, the short carbon fiber reinforced polyether-ether-ketone material can better meet the requirement on strength.
The utility model discloses use short carbon fiber reinforcing polyether ether ketone as the main part of material preparation wedge artificial bone, have very high mechanical strength, can prevent to cause the artificial bone main part to sink owing to the atress behind the immigration human body, but, the human internal bone tissue of intensity too high will produce stress shielding effect. Therefore, the utility model discloses an it comes the clearance rate of adjustment hole wedge bone main part to set up bone growth hole at wedge bone main part, adjusts the elastic modulus and the intensity of artificial bone to be close with human bone mutually, avoids stress shielding phenomenon. And the utility model provides a wedge bone main part's porosity has very big improvement than the artificial bone of making with traditional mode, is favorable to the growth of bone more, can combine with artificial bone better.
The present invention provides a bone growth hole, which is formed in the wedge-shaped bone main body, or is formed in the surface of the wedge-shaped bone main body, or is formed in the wedge-shaped bone main body and the wedge-shaped bone main body combined together.
According to the characteristics of the implanted artificial bone, the hole-shaped structure can be selected to penetrate through the artificial bone body or only perforate the surface, or the combination of the penetration and the surface perforation; wherein, if the surface of the artificial bone body is perforated, the adjacent hole-shaped structures can also be designed to be communicated with each other at the bottom. The bone growth holes penetrating through the artificial bone body may be crossed and penetrated inside the artificial bone body. The design of the porous structure needs to be individually designed according to the characteristics of the implantation position.
The bone growth pores need to ensure sufficient strength and rigidity of the artificial bone, and if the pore structure proportion is too large or a single pore structure is too large, the strength and rigidity of the artificial bone may be insufficient or the local strength is insufficient; meanwhile, it is also necessary to ensure that the implanted artificial bone can be fused well with the original bone in the body of the patient, and if the ratio of the porous structure is too small or the local pore diameter is too small, the artificial bone may not be fused well or locally with the original bone in the body of the patient. Therefore, in the utility model discloses in, the porosity of short carbon fiber reinforcing polyether ether ketone wedge bone main part is 5% ~ 40%, the diameter of bone growth hole is 0.5 ~ 10 mm. The porosity and the diameter of the bone growth pores are adjusted according to the elastic modulus and strength of the human bone.
Referring to fig. 1, fig. 1 is a schematic view of an included angle between wedge-shaped bone slopes according to the present invention. In fig. 1, a represents the inclination angle of the wedge-shaped artificial bone, i.e. the included angle of the inclined plane of the wedge-shaped artificial bone. The inclination angle of the wedge-shaped artificial bone is the most critical parameter of the wedge-shaped artificial bone, and the correction angle of the artificial bone to a patient is concerned. Referring to the figure, the inclined angle of the wedge-shaped artificial bone, namely the included angle of the inclined plane of the wedge-shaped artificial bone, is 3-30 degrees.
Furthermore, the upper and lower surfaces of the wedge-shaped artificial bone can be in a plane shape, a sawtooth shape, an irregular shape and the like, and are determined according to the specific conditions of patients.
Furthermore, the cross section of the hole-shaped structure in the wedge-shaped artificial bone can be in the shape of a regular cross section such as a cylinder, a square, a triangle and the like, or in the shape of an irregular cross section, a cross structure, a space grid and the like, and the design of the hole-shaped structure can be changed according to the specific shape of the artificial bone
The wedge-shaped artificial bone provided by the utility model also comprises a filler which is filled in the bone growth hole and can promote the bone growth, the utility model is right, the type of the filler is not limited specially, and the filler which is known by the technical personnel in the field and can promote the bone growth can be used. The filler is tricalcium phosphate, calcium sulfate hemihydrate, PLGA, bioceramic or bioglass.
The tricalcium phosphate used in the utility model is beta-tricalcium phosphate.
The alpha-calcium sulfate hemihydrate has good biocompatibility and degradability, can promote osteoblasts to attach and form bones, enables osteoclasts to absorb calcium sulfate to form biodegradation, is used as a filler of a gap in a bone defect area, forms a micro-acid environment, is favorable for the growth of blood vessels and osteoblasts, and provides a matrix required by bone formation.
It is right to the utility model discloses, alpha-calcium sulfate hemihydrate has an important characteristic that it meets water after-production crystal water, solidifies the sclerosis and becomes calcium sulfate dihydrate for the raw materials originally are the filler thick liquid of powder or fluid, in the bone growth slot hole of wedge bone main part, can solidify into the solid, make things convenient for follow-up processing on the one hand, and on the other hand has further improved the intensity of artifical bone.
The utility model provides a cut with wedge artificial bone after bone still including seting up in the high position of shin bone the fixed orifices of wedge bone main part, the fixed orifices is used for cutting wedge artificial bone and HTO and cuts the connection at the defective position behind the bone. The connection method of the present invention is not particularly limited, and may be any connection method known to those skilled in the art.
The filler fills the bone growth holes of the wedge-shaped artificial bone.
Referring to fig. 2, fig. 2 is a schematic structural view of the wedge-shaped artificial bone for high tibial osteotomy provided by the present invention. In fig. 2, 1 is a wedge-shaped bone main body of short carbon fiber reinforced polyetheretherketone, 2 is a bone growth hole opened in the wedge-shaped bone main body, and 3 is a fixing hole. Wherein a filler capable of promoting bone growth is filled in the bone growth hole (not shown).
The utility model discloses an among some embodiments, the poroid structure is the circular port that runs through at three-dimensional mutually perpendicular, and the aperture is 0.5 ~ 10mm, and preferably 2 ~ 5mm, the hole interval is 1 ~ 5mm, specifically refer to fig. 4 ~ 6. Fig. 4 is an external view of a wedge-shaped artificial bone body, fig. 5 is a perspective view of the wedge-shaped artificial bone body, and fig. 6 is a sectional view of the wedge-shaped artificial bone body.
The utility model also provides a preparation technology of the wedge-shaped artificial bone used after the high-position osteotomy of the tibia, which comprises the following steps:
A) preparing a short carbon fiber reinforced polyether-ether-ketone wedge-shaped bone main body with bone growth holes according to the shape of the damaged bone;
B) filling fillers capable of promoting bone growth into the bone growth holes of the wedge-shaped bone main body, and curing to obtain a wedge-shaped artificial bone precursor;
C) and carrying out heat treatment and disinfection on the wedge-shaped artificial bone precursor to obtain the wedge-shaped artificial bone.
The utility model discloses at first according to the form of impaired bone, prepare short carbon fiber reinforcing polyether ether ketone wedge bone main part. Referring to fig. 3, fig. 3 is a schematic view of an HTO surgical osteotomy site. The utility model discloses in, the method of preparation short carbon fiber reinforcing polyether ether ketone wedge bone main part is machine-building or 3D prints, preferably 3D prints or two kinds of technologies of CNC processing, and further preferably 3D prints.
The utility model discloses in, 3D prints the concrete method of preparation short carbon fiber reinforcing polyether ether ketone wedge bone main part as follows:
step one, data acquisition and modeling are carried out: the method comprises the steps of collecting damaged bone data, preparing a 3D bone model according to the data, and arranging a plurality of hole-shaped structures on the surface and/or inside the 3D bone model.
Firstly, observing the force line of the lower limb at the affected side according to the lower limb full-length orthostatic X-ray film of a patient, accurately measuring the angle of the femur and tibia, and calculating the degree to be corrected, wherein the angle is the angle of the wedge-shaped artificial bone.
And then according to CT scanning data of a bone part to be implanted, introducing MIMICS software for processing, outputting an STL format file, introducing the file into 3-MATIC software for 3D modeling, establishing a 3D model of the wedge-shaped artificial bone, and outputting the STL format file (for 3D printing) or an IGES format file (for machining).
Because of individual differences of the varus angle, whether to combine front and back inclination, the height and depth of the implanted prosthesis and the like of different patients, the specific shape and size of the wedge-shaped artificial bone need to be determined according to actual conditions.
Step two, preparing the artificial bone main body: the artificial bone body is prepared by 3D printing or machining.
The artificial bone has a high complexity of structure because it needs to be matched with surrounding bones, and at the same time, a porous structure is needed to be arranged on the surface and inside of the artificial bone, so that the complexity of the structure of the artificial bone is further improved. In order to ensure that complicated meticulous artificial bone can be prepared, simultaneously, reduce the waste of raw materials in the preparation of artificial bone main part process, in the preparation of artificial bone main part, the utility model provides an among the technical scheme, can adopt the mode that 3D printed to carry out the preparation of artificial bone main part.
The wedge-shaped artificial bone can also be prepared by machining when the structure is less complicated. The non-porous wedge-shaped short carbon fiber reinforced polyether-ether-ketone substrate can be prepared firstly, and then the substrate is perforated.
Step three, filling material injection: and D, injecting the filling layer slurry into the porous structure of the artificial bone main body prepared in the step two, and curing to obtain the wedge-shaped artificial bone precursor.
In the present invention, the slurry is prepared according to the following method:
the filler capable of promoting bone growth and normal saline are uniformly mixed to obtain slurry.
The utility model discloses it is right the method of mixing does not have special restriction, can all be applied to the mixing method of raw materials misce bene the utility model discloses.
And pouring the slurry into the bone growth holes of the wedge-shaped bone main body, and curing. Wherein, the perfusion method is syringe perfusion.
The curing temperature is room temperature, and the curing time is 2-5 minutes. In the present invention, the room temperature is defined as 25 ± 5 ℃.
And step four, sequentially carrying out heat treatment and disinfection on the precursor to obtain the wedge-shaped artificial bone product.
Through the heat treatment step, the internal stress of the artificial bone product can be eliminated or reduced, and the mechanical property and the biological property of the artificial bone product can be improved. Specifically, the heat treatment process can be carried out at the temperature of 200-250 ℃ for 1-4 h; can be finely adjusted according to the actual characteristics of the artificial bone structure.
The method of sterilization is not particularly limited in the present invention, and any sterilization method known to those skilled in the art may be used.
The utility model discloses the short carbon fiber reinforcing polyether ether ketone with high strength can prevent to sink as the main part material of wedge bone, avoids the too high human internal bone tissue of intensity of wedge bone main part to produce stress shielding effect simultaneously, the bone growth hole has been seted up to wedge bone main part, makes the intensity matching of wedge bone main part and human internal bone tissue to it has the filler that can promote bone growth to grow the downthehole packing, because the filler has good biological activity and biocompatibility, under the effect of body fluid, the filler can take place partial degradation, and the material that dissociates after the degradation can be absorbed by human tissue and utilized, grows out new tissue, thereby has produced good bone conduction effect. The new bone that osteoacusis produced can grow into the inside bone growth hole that the artificial bone main part was seted up, forms three-dimensional interpenetrating structure with original bone and new bone, is favorable to the combination of artificial bone and patient self bone, has solved artificial bone implantation patient internal unable technical defect with patient self bone fusion, can avoid artificial bone not hard up simultaneously, and patient's activity is more free, can not arouse painful uncomfortable sense because of friction between artificial bone and self skeleton.
In order to further understand the present invention, the following embodiments are combined to illustrate the wedge-shaped artificial bone after the high tibial osteotomy provided by the present invention, and the protection scope of the present invention is not limited by the following embodiments.
Example 1
This example is a specific example of preparing the artificial bone product 1.
An artificial bone preparation method comprises the following steps:
step one, data acquisition and modeling
Firstly, observing the force line of the lower limb at the affected side according to the lower limb full-length righting X-ray film of a patient, accurately measuring the angle of the femur and tibia, calculating the degree to be corrected, wherein the angle is the angle of the wedge-shaped artificial bone, and simultaneously determining the osteotomy part.
Scanning an osteotomy part of a patient by adopting high-precision CT to obtain three-dimensional model data; and importing the data into MIMICS software for processing, and outputting the STL format file. And importing the file into 3-MATIC software to perform 3D modeling, establishing a three-dimensional model of the artificial bone, and outputting the STL format file.
Set up a plurality of poroid structures on the artificial bone main part of 3D modeling gained, poroid structure is the circular port that mutually perpendicular runs through in three-dimensional, and aperture 2 ~ 4mm, hole interval are 2 ~ 6mm, specifically refer to fig. 4 ~ 6, and the volume of poroid structure accounts for 10% of artificial bone main part.
Step two, preparing the artificial bone main body
And (3) importing the obtained STL format file into an FDM 3D printer for 3D printing, wherein the 3D printing consumable material is a medical-grade short carbon fiber reinforced polyether-ether-ketone wire rod with the diameter of 1.75mm (wherein the length-diameter ratio of the short carbon fiber is 75:1, and the length of the short carbon fiber is 0.75 mm).
Step three, filling material injection
And preparing a thick hydroxyapatite mixture, quickly injecting the mixture into the hole on the artificial bone by using a needle tube, and curing at room temperature. The mixture ratio of the thickened hydroxyapatite mixture is as follows: 100 parts of calcium sulfate hemihydrate, 3 parts of stearic acid and 80 parts of normal saline.
Step five, post-treatment
The artificial bone is subjected to heat treatment, and the heat treatment process comprises the following steps: the temperature is 200 ℃, the time is 4 hours, and after the heat treatment is finished, the sterilization is carried out and the storage is proper.
Example 2
This example is a specific example of preparing the artificial bone product 1.
An artificial bone preparation method comprises the following steps:
step one, data acquisition and modeling
Firstly, observing the force line of the lower limb at the affected side according to the lower limb full-length righting X-ray film of a patient, accurately measuring the angle of the femur and tibia, calculating the degree to be corrected, wherein the angle is the angle of the wedge-shaped artificial bone, and simultaneously determining the osteotomy part.
Scanning a bone defect part of a patient by adopting high-precision CT to obtain three-dimensional model data; and importing the data into MIMICS software for processing, and outputting the STL format file. And importing the file into 3-MATIC software to perform 3D modeling, establishing a three-dimensional model of the artificial bone, and outputting the STL format file.
Set up a plurality of poroid structures in the artificial bone main part of 3D modeling gained, the poroid structure is the circular port that mutually perpendicular runs through in three-dimensional, and aperture 2 ~ 4mm, hole interval are 1 ~ 3mm, and the volume of poroid structure accounts for 20% of artificial bone main part.
Step two, preparing the artificial bone main body
And (3) introducing the obtained STL format file into an SLS laser powder sintering 3D printer for 3D printing, wherein medical-grade short carbon fiber reinforced polyether-ether-ketone powder (the length-diameter ratio of the short carbon fiber is 50:1, and the length is 0.5mm) is selected as a 3D printing consumable.
Step three, filling material injection
The prepared thick mixture is quickly injected into the hole on the artificial bone by a needle tube and is solidified at room temperature. The mixture ratio of the thick mixture is as follows by mass: self-curing calcium phosphate (including hydroxyapatite 100 weight portions and collagen 20 weight portions).
Step five, post-treatment
The artificial bone is subjected to heat treatment, and the heat treatment process comprises the following steps: the temperature is 220 ℃, the time is 3 hours, and after the heat treatment is finished, the sterilization is carried out and the storage is proper.
Example 3
This example is a specific example of preparing the artificial bone product 1.
An artificial bone preparation method comprises the following steps:
step one, data acquisition and modeling
Firstly, observing the force line of the lower limb at the affected side according to the lower limb full-length righting X-ray film of a patient, accurately measuring the angle of the femur and tibia, calculating the degree to be corrected, wherein the angle is the angle of the wedge-shaped artificial bone, and simultaneously determining the osteotomy part.
Scanning a bone defect part of a patient by adopting high-precision CT to obtain three-dimensional model data; and importing the data into MIMICS software for processing, and outputting the STL format file. And importing the file into 3-MATIC software to perform 3D modeling, establishing a three-dimensional model of the artificial bone, and outputting an IGES format file.
Set up a plurality of poroid structures on the artificial bone main part of 3D modeling gained, the poroid structure is the circular port that mutually perpendicular runs through in three-dimensional, and aperture 3 ~ 6mm, hole interval are 1.5 ~ 5mm, and the volume of poroid structure accounts for 30% of artificial bone main part.
Step two, preparing the artificial bone main body
And importing the obtained IGES format file into machining equipment for machining. The material is medical-grade short carbon fiber reinforced polyether-ether-ketone wire rod material (wherein the length-diameter ratio of the short carbon fiber is 150:1, and the length is 1.5mm), and the machining equipment is a medical-grade high-precision numerical control machine tool.
Step three, filling material injection
The biological ceramics are made into a cylinder shape corresponding to the hole and are directly inserted into the hole.
Step five, post-treatment
And D, carrying out heat treatment on the product obtained in the step four, wherein the heat treatment process comprises the following steps: the temperature is 230 ℃ and the time is 2 hours, and after the heat treatment is finished, the sterilization is carried out and the storage is proper.
Example 4
This example is a specific example of preparing the artificial bone product 1.
An artificial bone preparation method comprises the following steps:
step one, data acquisition and modeling
Firstly, observing the force line of the lower limb at the affected side according to the lower limb full-length righting X-ray film of a patient, accurately measuring the angle of the femur and tibia, calculating the degree to be corrected, wherein the angle is the angle of the wedge-shaped artificial bone, and simultaneously determining the osteotomy part.
Scanning a bone defect part of a patient by adopting high-precision CT to obtain three-dimensional model data; and importing the data into MIMICS software for processing, and outputting the STL format file. And importing the file into 3-MATIC software to perform 3D modeling, establishing a three-dimensional model of the artificial bone, and outputting the STL format file.
Set up a plurality of pore structures on the artificial bone main part of 3D modeling gained, pore structure is the circular port that mutually perpendicular runs through in three-dimensional, and aperture 4 ~ 8mm, hole interval are 2 ~ 6mm, and pore structure's volume accounts for 40% of artificial bone main part.
Step two, preparing the artificial bone main body
And (3) importing the obtained STL format file into an FDM 3D printer for 3D printing, wherein the 3D printing consumable material is a medical-grade short carbon fiber reinforced polyether-ether-ketone wire rod with the diameter of 1.75mm (wherein the length-diameter ratio of the short carbon fiber is 200:1, and the length of the short carbon fiber is 2 mm).
Step three, filling material injection
The biological ceramics are made into a cylinder shape corresponding to the hole and are directly inserted into the hole.
Step five, post-treatment
And D, carrying out heat treatment on the product obtained in the step four, wherein the heat treatment process comprises the following steps: the temperature is 240 ℃ and the time is 1.5h, and after the heat treatment is finished, the sterilization is carried out and the storage is proper.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A wedge-shaped artificial bone for use after a high tibial osteotomy, comprising:
the short carbon fiber reinforced polyether-ether-ketone wedge-shaped bone main body;
a bone growth hole opened in the wedge-shaped bone main body;
and the filler is filled in the bone growth hole and can promote the bone growth.
2. The wedge shaped artificial bone of claim 1, wherein the bone growth aperture extends through the wedge shaped bone body, or opens onto a surface of the wedge shaped bone body, or a combination thereof.
3. The wedge-shaped artificial bone according to claim 1, wherein the porosity of the short carbon fiber reinforced polyetheretherketone wedge-shaped bone body is 5 to 40%, and the diameter of the bone growth hole is 0.5 to 10 mm.
4. The wedge-shaped artificial bone according to claim 1, wherein the included angle of the inclined plane of the wedge-shaped artificial bone is 3-30 degrees.
5. The wedge-shaped artificial bone according to claim 1, wherein said filler is tricalcium phosphate, calcium sulfate hemihydrate, PLGA, a bioceramic or a bioglass.
6. The wedge shaped artificial bone according to claim 1, further comprising a fixation hole opened to the wedge shaped bone body.
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|---|---|---|---|---|
| CN110559480A (en) * | 2019-10-12 | 2019-12-13 | 广州市阳铭新材料科技有限公司 | Wedge-shaped artificial bone used after high tibial osteotomy and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110559480A (en) * | 2019-10-12 | 2019-12-13 | 广州市阳铭新材料科技有限公司 | Wedge-shaped artificial bone used after high tibial osteotomy and preparation method thereof |
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